Rudolph segerdahl



R. SEGERDAHL. ELEGTRIG ARG LAMP.

No. 559,412. Patented May 5, 1896.

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UNITED .STATES PATENT OFFICE.

RUDOLPH SEGERDAI'IL, OF CIIICAGO, ILLINOIS, ASSIGNOR TO THE VESTERN ELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION' forming part of Letters Patent No. 559,412, dated May 5, 1896.

Application led September l0, 1895. Serial No. 562,041. (No model.)

. To all wiz/0m, it may concern: engaged by theclutch. A guide or support Be it known that I, RUDOLPH SEGERDAHL, is provided, preferably in the form of a bent a citizen of the United States, residing at Chirod, the carbon-rod bein g adapted to surround cago, in the county of Cook and State of Illi and move longitudinally upon the bent rod. 55

5 nois, have invented a certain new and useful By this construction the carbon-rod is main- Improvement in Flexible Carbon Rods for tained at all times within the casing inclosing Arc-Lamps, (Case No. 1,) of which the followthe feeding niechanism. ing is a full, clear, concise, and exact descrip- Referring to the accompanying drawings, tion, reference beinghad to the accompanying Figure l is a View in elevation of an arc-lamp 6o io drawings, forming a part of this speeiiication. embodying my invention, the carbon-rod be- My invention relates to a flexible earboning shown in its elevated position. Fig. 2 is rod for are-lamps, my object being to shorten a similar view showing the carbon-rod in its the length of the lamp by dispensing with the lowered position. straight carbon-rod, and in consequence with Like letters refer to like parts in both 65 i5 the chimney inclosing the upper end of the figures.

carbon-rod. Furthermore, my object is to The upper carbon a is secured in a clamp construct a flexible carbon-rod that may be b, carried upon the end of the flexible carbonreadily substituted for the straight carbonrod c, which passes through the feeding-clutch rods now in use without necessitating the ald and is bent about the J shaped guide or 7o 2o teration of the clutch and feeding mechanism supporting-rod c. Upon the lower end of the of the lamp. carbon-rod is provided a cross-head c', carry- In arc-lamps as generally constructed the ing guides c2 c2, adapted to slide upon the upper carbon is suspended from the lower side rods c3 c3 of the lamp. As the oarbons end of a straight'carbon-rod which passes burn away the clutch d is operated by the 75 25 through a clutch operated by the feeding feeding and regulating mechanism f of the mechanism, the clutch controlling the movelamp to permit the descent of the upper earment of the carbon-rod to effect the regulabon a, the flexible carbon-rod c thus moving` tion of the are. 'Vhen the carbon-rod is in longitudinally upon the guide c. The carbonits uppermost position, its upper end extends rod cis formed from wire wound into a spiral 8o 3o for a considerable distance above the body of or helical coil of a size to iit the clamp or clutch the lamp, some six or eight inches, and a d. The surface of the carbon-rod is preferchimney inclosing the upper end of the carably iiled away slightly, so that a more or less bon-rod is mounted upon the casing which cylindrical surface may be presented to the surrounds the feeding mechanism. clutch, whereby the rod may be more readily/S 5 3 5 It is the object of my invention to shorten engaged. Then the carbon-rod is in its upthe length of the lamp by dispensing withthe permost position, it will be noted that the chimney and the straight carbon-rod which maximum length of the rod is bent about the necessitates its employment, and in accordguide c, and as the carbon-rod descends the ance with my invention a flexible carbon-rod portion of the rod which is bent about the 9o 4o is provided, to the lower end of which the guide decreases. In consequence the friction upper carbon is secured, the iiexible carbonbetween the flexible carbon-rod and its suprod passing through the clutch in the same port is greatest when the lamp begins to manner as the straight carbon-rod heretofore burn, and as the weight of the upper carbon employed. A guide or support is provided, decreases, due to burning away, the friction 95 45 about which the upper end of the iiexible caropposing the downward movement of the carbon-rod is adapted to be bent. bon also decreases. This feature is advanta- In the form of my invention which I prefgeous in promoting the uniformity of the are. erably employ the iiexible carbon rod is When the carbon-rod is made in the form of formed by winding wire into a spiral or helia coil or helix, the rod possessesA more or less roo 5o cal coil, the coil having the diameter of the resiliency, and this further contributes to the usual carbon-rod, whereby it may be readily smooth burning of the lamp.

Instead of making the guide e J-shaped, it may be inade in any other curved forin, as may be desired, and instead of having the lexible carbon-rod move upon the exterior of the guide the guide may be otherwise disposed.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

I. In an arc-lamp, the combination With a IleXibIe carbon-rod, of a clutch through which said carbon-rod is passed and by means of which the saine is fed forward7 and a guide or support around which the flexible carbonrod is adapted to be bent; substantially as described.

2. In an arc-lamp, the combination with a clutch adapted to receive a round carboirrod, of a flexible carbonrod having a round crosssection and adapted to pass through said clutch, and a guide or support around which said carbon-rod is adapted to be bent; substantially as described.

3. In an arc-lamp, the combination with a ilexible carbon-rod formed from a spirallycoiled Wire7 of a guide or support around which the flexible carbon-rod is adapted to be bent; substantially as described.

In witness whereof I hereunto subscribe niy name this 27th day of August, A. D. 1895.

RUDOLPH SEGERDAHL.

JOHN W. SINCLAIR, NV. CLYDE JONES. 

